A novel osteotomy in shoulder joint replacement based on analysis of the cartilage/metaphyseal interface

被引:5
作者
Harrold, Fraser [1 ]
Malhas, Amar [1 ]
Wigderowitz, Carlos [1 ]
机构
[1] Univ Dundee, Ninewells Hosp & Med Sch, TORT Ctr, Coll Med Dent & Nursing,Dept Orthopaed & Trauma S, Dundee DD1 9SY, Scotland
关键词
Shoulder; Arthroplasty; Osteotomy; Anatomy; Humerus; Geometry; GLENOHUMERAL JOINT; HUMERAL HEAD; ARTICULAR GEOMETRY; 3-DIMENSIONAL ANALYSIS; PRIMARY OSTEOARTHRITIS; GLENOID COMPONENT; PROXIMAL HUMERUS; ARTHROPLASTY; HEMIARTHROPLASTY; COMPLICATIONS;
D O I
10.1016/j.clinbiomech.2014.08.008
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Background: The accuracy of reconstruction is thought to impact on functional outcome following glenohumeral joint arthroplasty. The objective of this study was to define an area of minimal anatomic variation at the cartilage/metaphyseal interface of the proximal humerus to optimize the osteotomy of the humeral head, enabling accurate reconstruction with a prosthetic component. Methods: Hand held digitization and 3D surface laser scanning techniques were used to digitize 24 cadaveric arms and determine the normal geometry. Each humeral head was then examined to identify the most consistent anatomical landmarks for the ideal osteotomy plane to optimize humeral component positioning. Findings: The novel, posterior referencing, osteotomy resulted in a mean increase in retroversion of only 0.4 degrees when compared to the original geometry. A traditional anterior referencing osteotomy, by comparison, produced a mean increase in retroversion of 11 degrees. In addition, the novel osteotomy only increased axial diameter by 0.71 mm and head height by 0.02 mm compared to an anterior referencing osteotomy (3.0 mm and 2.7 mm respectively). Interpretation: The traditional osteotomy, referencing the anterior border of the cartilage/metaphyseal interface potentially resulted in an increase in prosthetic head size and retroversion. The novel osteotomy, referencing from the posterior cartilage/metaphyseal interface enabled a more accurate recovery of head geometry. Importantly, the increase in retroversion created by the traditional osteotomy was not replicated with the novel technique. Referencing from the posterior cartilage/metaphyseal interface produced a more reliable osteotomy, more closely matching the original humeral geometry. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1032 / 1038
页数:7
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